A self-adjusting pretension steel wire rope sling

Abstract

The invention relates to a self-adjusting preload steel wire rope rigging. The self-adjusting preload steel wire rope rigging comprises a rigging body, wherein the middle part of the rigging body is provided with a plurality of outer coniform trapezoidal bulges, an upper semicircular body and a lower semicircular body which are buckled together are arranged at the outside of the outer coniform trapezoidal bulges; one end of each of the upper semicircular body and the lower semicircular body is provided with a fixing plate, and each of the other ends of the upper semicircular body and the lower semicircular body is provided with an external spring support; the rigging body penetrates through the fixing plate and the external spring support and then is fixed by a locking nut; the middle parts of the inner sides of the upper semicircular body and the lower semicircular body are provided with projected blocks; a cavity is formed between the projected blocks and the spring support; the rigging body is sleeved with a spiral spring; the upper semicircular body and the lower semicircular body are compressed on the fixing plate under the function of the preload of the spiral spring. The self-adjusting preload steel wire rope rigging provided by the invention automatically adjusts through the spiral spring, which is timely and reliable; and the cumbersome labor is saved, and the performance reduction due as a telescopic boom is not in place due to the untimely adjusting as well as the not smooth operation and the early damage of the parts due to the impact can be avoided; electrostatic spray is performed on the surfaces of the outer coniform trapezoidal bulges and the inner coniform trapezoidal bulges, so that the friction resistance of the automatic adjustment can be reduced.

Description

technical field

[0001] The invention belongs to the technical field of traction slings for engineering machinery such as telescopic boom cranes, forklifts, and high-altitude operating vehicles, and in particular relates to a self-adjusting pretightening steel wire rope sling. Background technique

[0002] For telescopic boom construction machinery and equipment with more than three booms, the last boom is driven by the telescopic boom hydraulic cylinder in the penultimate section, and the lifting is driven by wire ropes and pulleys. When the equipment leaves the factory, the pre-tightness of extending and retracting the steel wire rope has been adjusted. However, with the stretching of the steel wire rope and the wear of the transmission parts during use, the pre-tightening degree will gradually disappear and become loose, resulting in stretching and shrinking. When the boom is not in place, the effective working height will be affected, and the impact of the telescopic boom...

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